Machine for grinding wood into pulp



Jul 11 1924.

P. PRIEM MACHINE FOR GRINDING WOOD INTO PULP Filed Allg- 16. 1923 2 $hweLs-Sheet 1 ATTORNEY.

P. PRIEM MACHINE Foh GRINDING WOOD m'ro PULP Filed 16. 1923 2 shmw-srmz 2 INVENTOR @Zfim'em 6 Wfiyd ATTORNEY.

Patented duly l, i924.

PAUL rarer/r, or nninnnun m .a rnnnz, sunivraur, Assisnor. TO aunnrcanf verm n CONTACT oouraur; or new YORK, n. r, a ooaroaarroiv or new YORK.

MACHINE FOR GRINDING WOOD INTO PULP.

Application filed August 16, 1923. Serial No. 657,652.

' To all whom it may concern:

Be it known that 1, PAUL PRIEM, a citizen of the Republic of Germany, and resi-v are provided with a magazine having. guides for the feed chains. A separate feed pocket is arranged adjacent to the lower end of the magazine, and isv made adjustable relativeto the magazine so as to compensate for the wear of the stone, while the magazine itself together with the feed device attached thereto, remain stationary.

As the stone wears down the distance from the lower end of the feed device to the stone increases, thus leaving a considerable height of wood billets out of contact with the feed device. Considerable friction is thereby produced between the wood billets and the side walls of-the feed device, in consequence whereof the feed itself becomes'in regular.

Furthermore, the connection between the lower end of themagazin'e and the feed device, if not made with the greatest accuracy, tends to form a recess which catches the wood billets, and thereby produces irregularities in the feed of the billets to the stone.

This invention has for one of its objects to obviate the defects and disadvantages of the grindingmachines now in use, as heretofore stated.

A further object of the invention is to provide a grinding machine of the character described, wherein a unitary magazine and. feed device is provided to take the place of the separate magazine and feed pocket heretofore used, and thereby avoid the recess commonly formed between the magazine and feed pocket.

The invention has also for one of its objects to provide means for making the hopper adjustable toward and away from the stone, wherebv the adjustability of the hon per towards the stone may: be. used toco p pensate for the wear of. the;- latter, an

whereby the hopper may be removed the stone for the purposev of procuring, the necessary clearance to enablelthe stone to be removed and replaced.

With the foregoing, and other objects irrv view, herein-after stated, the invention. consists of the novel construction, combination; n arrangement of Pa e einafter specifically stated, and illustrated. in. the accompanying drawings, wherein is shown a device embodving the structure; oii'the in vention in its preferred. form, but, it; is, to be understood a hang ariati ns a d inodificationsmay be resorted to without de parting from the scope of the. invention.

In describing the invention in detail reference is had tov the accompanying drawings, which form a part of this specification, and wherein like characters of reference indicate corresponding parts throughout the; several views.

As illustrated in the drawings.

Fig. 1 1s a side elevation of a wood grinding machine involving my invention, with the parts in working position; and

Fig. 2 is a similar elevation to that shown in Fig. 1 with the grinder arranged for changing the stone.

As illustrated in the drawings, a grindstone B is suitably mounted upon. afounda tion A, and a hopper Cv is. arranged over. the grindstone B, adapted to receive the, wood billets D to be ground.

When in operation the lower or discharge end of the hopper is set closely tothegrind stone B as shown in Fig. 1.

Girders C are attached to each. side wall ofthe hopper C at a convenient height, and

are supported upon a base of any suitable construction, such as the beams a, by means of nuts G which engage threaded spindles E, supported upon the beams a The spindles E are each provided with, a worm wheel F which engages a correspond ing worm G fixed in pairs upon. a common shaft 9 As, the. shafts g are turned, the Worms. mounted thereon turn the engaging worm wheels F and the spindles E and thereby raise the hopper near to, or away from the grinding stone.

The two oppositely disposed shafts g each supporting a pair of worms, have their .C and engage sprocket-wheels M.

corresponding ,ends connected together by means of sprocket-wheels mounted thereon, and chains 9 engage therewith.

The drive of one of the shafts g is operated by hand or motor by means of a counter gear 9 mounted upon one of the shafts, and a drive chain J, connected with a sprocket-wheel controlled by a crank K.

Any suitable feed device for .mOVing'the wood billets may be used.

In the device shown in the drawings tw oppositely disposed endless chains L run along the front and wall H of the hopper The chains are provided with spurs adapted to engage and move the billets downward to the grindstone B.

The devic for the drive of the sprocket wheels M is so designed as to permit vertical adjustment of the hopper within the necessary limits.

From the above it will be seen that certain distinct advantages exist in the improved device. It is also advantageous. to

have a common drive for all the supporting spindles and. also to make these spindles long enough so that they can also be used for lifting the. entire hopper, when the stone is changed, without making a separate lifting arrangement necessary.

I have rovided a unitaryhopper or magazine and feed device in that the magazine feeds directly to the grindstone without intermediary means as pockets, adjustable Walls and the like, Which unitary magazine and feed device operates as an entity with the grinding means, and obviates the recess commonly formed between the magazine and feed pocket as in devices as heretofore proposed.

In the improved device, the magazine is open at the top and the feeding means eX- tend to the lower portion of the magazine hopper, and as ,the grindstone is indirect proximity With the magazine hopper, almost incontact, therewith, the magazine pressure is tranferred directly to the grindstone, and the grindstone operates directly upon the parood billets of the magazine without any intermediary means therebetween.

have shown various embodiments of my invention, but changes can be made therein without departing from the spirit of the same as defined by the appended claims. i

What I claim as new anddesire to secure by LettersP'atent is:

1. In a magazine grinder for grinding wood into pulp, the combination. of a uni- ,tary magazine hopper having an open end at its uper portion and feeding means. extending along the sides of the magazine hopper to the lower portion thereof. for receiving a charge of wood billets. a grindstone below the magazine hopper, and at the lower portion thereof, and adapted to operate upon the wood billets directly as they are fed by th feeding means from out of the magazine hopper itself upon the grindstone, and means for moving the unitary magazine hopper with its feeding means towards and away from the grind-- stone, whereby the action of the feeding means of the magazine hopper upon the wood billets is. transferred directly upon the grindstone from the magazine hopper with magazine hopper pressure and the magazine hopper may b moved away from thc grindstone to enable the grindstone to he moved clear of the magazine hopper.

2. In a magazine grinder for grinding wood into pulp. the combination of a unitary magazine hopper having an open end at its upper portion and feeding means. extending along the sides o the magazine hopper to the lower portion thereof. for receiv ing a charge of wood billets. a grindstone below the magazine hopper. and at the lower portion thereof. and adapted to operate upon the wood billets directly as they are fed by the feeding means from out of the magazine hopper itself upon the grindstone. means for moving the unitary magazine hopper wit-h its feeding means towards the grindstone, whereby the action of the feeding means of the magazine hopper upon the wood billets is transferred directly upon the grindstone from the magazine hopper with magazine hopper pressure, supporting means for th magazine, and means for simultaneously moving the said supporting means and the magazine. in respect to the grindstone.

3. In a grinding machine, a combination of a grindstone. a magazine hopper mounted above said stone. and provided with an open top for receiving a charge of wood billets. a. feeding device extending along the sides of said magazine hopper to the lower end thereof. girders secured to said maga zine hopper, threaded spindles engaging the girders, and means for operating said spindles simultaneously. for uniformly raising or lowering the magazine hopper in respect to the grindstone.

In testimony that I claim the foregoing as my invention, have signed my name hereunder.

PAUL PRTEM, 

